Stop motion



July 9, 1946.

B. PLUNKETT S'ror MOTION Filed NOV. 25, 1944 INVENTOR.

BRIAN PLUNKETT ATTO RNEYS Patented July 9, 1946 s'ror MOTION BrianPlunkett, Cumberland, Md., assignor to Celanese Corporation of America,a corporation of Delaware Application November 25, 1944, Serial No.565,070

Claims.

This invention relates to textile machines wherein yarn is fed theretoin the form of a warp and wherein there is employed an electricallyoperated warp stop motion, and relates more particularly to anattachment for use with such machines for closing the circuit of thewarp stop motion, upon breakage of a warp yarn, to halt the operation ofthe machine.

It is an important object of this invention-to provide a simple andefllcient device which may be readily applied to a machine wherein yarnis fed in the term oi. a warp, which will activate the stop motion oithe machine to halt the operation of the same upon breakageoi' a warpyarn.

Other objects of this invention, together with.

certain details oi construction and combinations 01 parts; willappeari'rom the iollowing detailed description.

While this invention may be employed with textile devices where the warpis knitted into a fabric, is sized, printed, dyed, or has any othertextile operation performed thereon, the invention will be described inconnection with its use with a warp knitting machine since it isparticularly effective therewith.

2 is included in a suitable stop motion circuit (not shown). 7 l

The pans 9 and H are filled with a salt solution or any other suitablelectrolyte. Placed in the top oi the pans and extending the full widththereof are plugs It made of wood or any other suitable material andcovered with a wick ii.

The wood plugs It are of such a size that when pushed into the top ofthe pans they seal the same sufllciently to prevent splashing. The lowerportion of. the plugs, indicated by reference numeral l8, aresharplytapered and dipped for substantial portion thereof into the solution. ofelectrolyte. The topsoi plugs It are provided with longitudinal groovesit which are adapted to be filled with solution drawn upby the wicks fora purpose hereinafter set forth.

' When a warp yam breaks (the broken end being indicated by dotted lineH) and the warp continues to unroll, the broken yarn drops on to theplugs It in the pans 9 and ii, soaking up the electrolyte and completinga. circuit. The

' solution in groove it maintains the top of the Figure 1 of the drawingis a diagrammatic view showing the attachment of the present invention,particularly with relation to the warp of being operated upon, and

Figure 2 is a perspective view showing the warp oi yarns passing overthe device of the instant invention.

Referring now to the drawing. reference numeral I indicates a warp oiyarns which is' fed from the warp beam 2 of a warp knitting machine,which warp beam is supported on a shaft I suitably journaled in the warpknitting machine. The shaft 3 is driven by any suitable means (notshown) The warp of yarns is passed under an idler guide roll 4, isprocessed (in the present case warp knitted) at i, and the fabric web ortreated web of yarns I is then passed over an' idler roller 6 and takenup at l on a take-up roller or shaft 8 driven in any suitable manner(not shown). Placed underneath the warp i and extending across the fullwidth of the warp knitting machine are pans 9 and H which areelectrically insulated from each other by suitable insulation I! placedbetween adjacent sides at said'pans. These pans are relatively smallbeing about V2" by 1" in cross-section. Pans 9 and it are each providedwith a copper wire ll r 1- .1. the full length thereoi', which wires areconnected by suitable leads I to a switch box, ge era-ily indicated byreference numeral Ii, whi

wick il extremely moistso that the broken-yarn quickly takes up thesolution so that the circuit closes very rapidly. The closing of thecircuit operates a switch in switch box it reflecting contact in a relayof the stop motion circuit to shutofi the warp knitting machine. Itv hasbeen found that the present device efiects a stoppage 4 oi the warpknitting machine in from 3 to 5 sec onds from the time of the yarnbreak.

It is tobe understood that the foregoing de. tailed description is givenmerely by way of illustration and that many variations may be madetherein without departing from the spirit of my invention.

Having described my invention, what I desire to secure by Letters Patentis:

1. In a textile device for operating on a traveling 'warp oi yarns,means Ior stopping the travel of said warp upon breakage of a yarnthereof, said means comprising a pair ofvessels adapted to holdelectrolyte, relatively stationary means in each of said vessels adaptedto be in contact with said electrolyte and to be wetted thereby, aswitch in a stop motion circuit, and an electrical connection betweensaid vessels and said switch, the construction and arrangement beingsuchthat a broken yarn upon coming into contact with saidelectroly-te-wetted means is wetted with electrolyte, thus closing thecircuit operating the switch to effect a closing of the stop motioncircuit and thereby halt'the operaion of the textile device.

4, electrolyte, relatively stationary means in each of said vesselsadapted to be in contact with said electrolyte and to be wetted thereby,a switch in a stop motion circuit,-and an electrical connection betweensaid vessels and said switch, the construction and arrangement beingsuch that a broken yar'n upon coming into contact with said circuit, andan electrical connection between said v vessels and said switch, theconstruction and arrangement being such that a broken yarn upon cominginto contact with said electrolyte-wetted plugs is wetted withelectrolyte,

the stop motion circuit and thereby halt the operation oi the textiledevice.

3. In a textile device for operating on a traveling warp of yarns, meansfor stopping the travel of said warp upon breakage of a yarn thereof,said means comprising a pair of vessels adapted to hold electrolyte,plugs in each of said vessels, wicks covering said plugs, said wicksbeing adapted to be incontact with said electrolyte and being wettedthereby, whereby the electrolyte is caused to wet the top of the plug, aswitch in a stop motion circuit, and an electrical connection betweensaid vessels and said switch, the construction and arrangement being.such that a thus closing the 4 circuit operating the switch to efiect aclosing of broken yarn upon coming into contact with saidelectrolyte-wetted wick is wetted with-electrolyte, thus closing thecircuit operating the switch to effect a closing of the stop motioncircuit and thereby halt the operation of the textile device.

4. In a textile device for operating on a travcling warp of yarns,.means for stopping the travel of said warp upon breakage of a yarnthereof, said means comprising a pair of vessels adapted to holdelectrolyte, plugs in each of said vessels, wicks covering said plugs,said wicks being adapted to be in contact with said electrolyte andbeing wetted thereby, whereby the electrolyte is caused to wet the topof the plug, means in said plug adapted to receive and retain a supplyof electrolyte, a switch in a stop motion circuit, and an electricalconnection between said vessels and said switch, the construction andarrangement being such that a broken yarn upon coming into contact withsaid electrolyte-wetted wick is wetted with electrolyte, thus closingthe circuit operating the switch to effect a closing of the stop motioncircuitnnd thereby halt the operation of the textile device.

5. In a textile device for operating'on a travcling warp of yarns, meansfor stopping the travel of said warp upon breakage of a yarn thereof,said means comprising a pair of vessels adapted to hold electrolyte,plugs in each of said vessels, wicks covering said plugs, said wicksbeing adapted to be in contact with said electrolyte and being wettedthereby, whereby the electrolyte is caused to wet the top of the plug, agroove in said plug adapted to receive and retain a supply ofelectrolyte, a switch in a stop motion circuit, and an electricalconnection between said vessels and said switch, the construction andarrangement being such that a broken yarn upon coming into contact withsaid electrolyterwetted wick is wetted with electrolyte, thus closingthe circuit operating the switch to effect a closing of the stop motioncircuit and thereby halt the operation of the textile device.

6. In a textile device for operating on a traveling warp of yarns, meansfor stopping the travel of said warp upon breakage of a yarn thereof,said means comprising a pair of vessels extending the full width of saidwarp and adapted to hold stop motion circuit, and an electricalconnection between said vessels and said switch, the construction andarrangement being such that a broken yarn upon coming into contact withsaid electrolyte-wetted longitudinal plugs is wetted with electrolyte,thus closing the circuit operating the switch to efiect a closing of thestop motion circuit and thereby halt the operation of the textiledevice.

8. In a textile device for operating on atravcling warp of yarns, meansfor stoppi the travel of said warp upon breakage of a yarn thereof, saidmeans comprising a pair of vessels extending the full width; of saidwarp and adapted to hold electrolyte, longitudinal plugs in each of saidvessels, wicks covering said plugs, said plugs havingtaperedportionshaving a length suiflcient to dip into-. said electrolyte whereby saidwicks are wetted by said electrolyte and cause the top of the plug to bewetted by capillarity, a switch in a stop motion circuit, and anelectrical connection between said vessels and said switch, theconstruction and arrangement being such that a broken yarn upon cominginto contact with said electrolyte-wetted wick on said longitudinalplugs is wetted with electrolyte, thus closing the circuit operating theswitch to eiTect a closing of the stop motion circuit and thereby halt'the operation of the textile device. a 9. In a textile device foroperating on a traveling warp of yarns, means for stopping the travel ofsaid warp upon breakage of a yarn thereof, saidmeans comprising a pairof vessels extending the full width of said warp and adapted to holdelectrolyte, longitudinalplugs in each of said vessels, wicks coveringsaid plugs, said plugs having tapered portions having a lengthsufllcient to dip into said electrolyte whereby said wicks are wetted bysaid electrolyte and cause the top of the plug to be wetted bycapillarity, means in said plug adapted to receive a and retain a supplyof electrolyte, a switch in a.

stop motion circuit, and an electrical connection between said vesselsand said switch, the construction and arrangementbeing such that abroken yarn upon coming into contact with said electrolyte-wetted wickon said longitudinal plugs is wetted with electrolyte, thus closing thecircuit operating the switch to effect a closin of the stop motioncircuit and thereby halt the operation of the textile device.

10. In a textile device for operation on a traveling warp of yarns,means for stopping the travel of said warp upon breakage of a yarnthereof, said means comprising a pair of vessels extending the fullwidth of said warp and nection between said vvessels and said switch,the

construction and arrangement being that a broken yarn upon coming intocontact with said electrolyte-wetted wick on said longitudinal plugs iswetted with electrolyte, thus closing the circuit operating the switchto effect a closing of the stop motion circuit and thereby halt theoperation of the textile device.

' BRIAN PLUNKE'I'I.

